MESON Chess Problem Database

Problem Display
PID: 27231 (8/8/8/3P4/2pp4/Pnkp4/4Q3/bR1K4 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

8/8/8/3P4/2pp4/Pnkp4/4Q3/bR1K4

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
    • 1...Sc1
      • 2.Qd2#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sa5
      • 2.Qd2#
    • 1...Sc5
      • 2.Qd2#
  • Tries
    • 1.Qe1+?
      • 1...Sd2
        • 2.Qxd2#
      • 1...d2!
    • 1.Qf2?
      • 1...Bb2
        • 2.Qxb2#
      • 1...Sc1
        • 2.Qd2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sa5
        • 2.Qd2#
      • 1...Sc5
        • 2.Qd2#
      • 1...d2!
    • 1.Qg2?
      • 1...Bb2
        • 2.Qxb2#
      • 1...Sc1
        • 2.Qd2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sa5
        • 2.Qd2#
      • 1...Sc5
        • 2.Qd2#
      • 1...d2!
    • 1.Qh2?
      • 1...Bb2
        • 2.Qxb2#
      • 1...Sc1
        • 2.Qd2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sa5
        • 2.Qd2#
      • 1...Sc5
        • 2.Qd2#
      • 1...d2!
  • Keys
    • 1.Qa2!
      • 1...d2
        • 2.Qc2#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Sc1
        • 2.Rxc1#
        • 2.Qxa1#
        • 2.Qd2#
      • 1...Sd2
        • 2.Rc1#
        • 2.Qxa1#
        • 2.Qxd2#
      • 1...Sa5
        • 2.Rc1#
        • 2.Qxa1#
        • 2.Qd2#
      • 1...Sc5
        • 2.Rc1#
        • 2.Qxa1#
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAB1(C),XB(a)
    • S(b);N_GUARD::QAB1(C)
    • S(b);N_GUARD::QAB1(C),XS(b)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(C),XS(b)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(C);
      • Vars
        • B(a);N_GUARD::QAB1(C),XB(a)
        • S(b);N_GUARD::QAB1(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Vars
        • B(a);N_GUARD::QAB1(C),XB(a)
        • S(b);N_GUARD::QAB1(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Vars
        • B(a);N_GUARD::QAB1(C),XB(a)
        • S(b);N_GUARD::QAB1(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • P(d);
  • Actual
    • Q(C);
    • Vars
      • P(d);N_GUARD::QAR1(C)
      • B(a);N_GUARD::QAB1(C),XB(a)
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